package cn.edu.scau.cmi.wuyihan.exercise5;

public class Lader {
         double upBottom,height;
         static  double downBottom;
         void setUpBottom(double a) {
        	 upBottom=a;
         }
         void setDownBottom(double b) {
        	 downBottom=b;
         }
         double getUpBottom() {
        	 return  upBottom;
         }
         double getDownBottom() {
        	 return  downBottom;
         }
}
